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A parallelogram has opposite sides equal in length and parallel. A trapezoid has at least 1 pair of parallel sides. EXAMPLE Classify a Quadrilateral 1 Classify the quadrilateral in as many ways as possible.It can be classified as a parallelogram, rectangle, square, and rhombus. 10-8 Quadrilaterals 0410-0413_CH10L8-105711.indd 410 7/20/09 11:41:30 AM.
The trapezoid has one pair of parallel sides. The parallelogram, rectangle, and square all have two pairs of parallel sides. Other less common shapes with parallel sides include any of the '-gons' with an even number of sides, such as a hexagon, octagon, decagon, etc. A hexagon and octagon with parallel sides.